TRIMYRISTIN POST LAB

When isolating the solid after recrystallization using vacuum filtration what solvent should you use to aid in the rinse from the Erlenmeyer flask to the vacuum filter funnel? (Only pick one answer) Group of answer choices: Cold ethyl acetate Cold ethanol Hot ethyl acetate Hot ethanol Hot water Cold water None of the above, it should not be risned

0.155 g of Acyclovir cream was mixed with 50 mL of 0.5M Sulphuric acid and extracted with 50 mL of ethyl acetate. The lower aqueous layer was collectedand the organic layer extracted with an additional 20 mL of 50mL of sulphuric acid. The aqueous layers were combined and made up to 100 mL with sulphuric acid. A portion of The resulting solution was filtered and 10 mL of the filtrate was further diluted to 50 mL. The absorbance of the final diluted solution was 0.833 at a wavelength of 255 nm. Additional information: A(1%, 1 cm) value for acyclovir at 255 nm = 562.

TRUE OR FALSE, if false then give the correct word to make the statement true then explain 1. Sublimation occurs when a solid has a relatively high vapor pressure at a temperature [above] its melting point. 2. To isolate the desired chemical, a single extraction is [more efficient] than extracting the compound numerous times. 3. The compounds are separated in liquid-liquid extraction based on their relative solubilities in two [immiscible] liquids.

please solve question 1 and 2, thanks alot sir for ur help, note that this is not a graded question, its a past paper

1. A vial containing an unknown sample is suspected to be one of the following compounds (mp.): urea (~133 °C), 2,4-dimethylacetanilide (~133 °C), phenacetin (~134°C) or 3-chlorobenzamide (~134 °C). A list of melting points taken on a machine when the 50% of the unknown by volume has been mixed with 50% each of the possibilities is shown in the following table: Melting point (°C) of mixture Substance mixed with unknown (50% each) urea 133.5-134.0 2,4-dimethylacetanilide phenacetin 3-chlorobenzamide 108.6-128.1 105.7-120.4 120.3-130.5 Identify the unknown and explain your reasoning, using the notes you have taken in the lab.

Using chemical structures, illustrate the differences in weak intermolecular interactions that would occur between both propane and 1-propanol and Carbowax 20M, a polyethylene glycol material. Draw a structure of the polyethylene glycol material to illustrate these interactions. Which of the two compounds do you expect to have longer retention time? Explain.

What is the purpose of washing the crude product with petroleum ether before filtration?

Answer to c is 1.56g. Please answer bottom question and disregard book pages.

Give detailed Solution with explanation needed..don't give Handwritten answer..don't use Ai for answering this

Diethyl ether and methylene chloride are generally not suitable for use in recrystallization, but are frequently used as extraction solvents. Explain

1. A student wants to dry a solution of aniline in hexane. Which drying agent should he use for the task? Rationalize the choice. 2.  If calcium oxide is used as a drying agent, what is obtained as a product? 3. Why is ill-advised to use P4O10 as drying agents for “wet” acetone?

please solve question 5 and 6, please sir

Why was n-octanol chosen as a surrogate for natural organic phases? Why notanother solvent such as n-hexane, methylbenzene, trichloromethane, or diethylether?Why is the use of any organic solvent as general surrogate of a natural organicphase somewhat questionable?

You will make Nylon-6,10. What does the 6 and 10 refer to? PROCEDURESynthesis of NylonIn a small beaker dissolve ~ 0.5 mL of sebacoyl chloride in 12 mL of ether. In a smalltest tube get ~ 6 mL (~1/4 of a 6 “ test tube) of 1,6-diaminohexane solution in water.In order to form the good polymer fibers, it is best to not mix the solutions. Youshould try to layer one solution on top of the other. First pour the 1,6-diaminohexanesolution into a 100 mL beaker. Then slowly pour the sebacoyl chloride down the sideof the tilted beaker with minimal mixing. At this point you should see two distinctlayers with a white film at the interface. Hook the nylon which forms at the interfacewith a straightened paper clip and pull slowly straight up as high as possible. Thenwrap it around your large beaker and then continue to wind the polymer around tillthe reaction is complete. Rinse your polymer in DI water to remove any salts or acidthat may be present.Weigh your product and characterize it by…

You are employed as a coop student at the Drug and Alcohol Testing Association of Canada (DATAC) developing analytical tests for sports doping agents. You are asked to prepare a procedure for the extraction of methylphenidate, the active compound in Ritalin, from urine samples (consider them as simple aqueous layers, you do not need to consider other components!). The goal of the procedure is to extract the methylphenidate into an organic layer which will then be evaporated, and the residue will be tested for the drug.Your colleague is helping you develop the urine test. They suggest that the urine should be adjusted to a pH above 7 before extracting with the organic solvent. Why is this necessary? Support your explanation with a full arrow-pushing mechanism for the reaction that would occur if the pH was below 7. Include all formal charges, intermediates (if applicable) and products.

Extraction of the aqueous salicylic acid solutions with 10% ethyl acetate/hexane (density ~ 0.7 g/ml) will give two layers in the separatory funnel. Will the aqueous layer be the upper layer or the lower layer?   If dichloromethane (density ~ 1.3 g/ml) were substituted for the 10% ethyl acetate/hexane solution, which layer would be the aqueous layer?